Dr. Jannsen and his father Hans were dutch eye glass makers who invented the microscope
cell first observed
1665 - Present
Robert Hooke was an English philosopher. He discovered cells by looking in a microscope and observed that the cells looked similar to to rooms.
first living cells seen
1670 - Present
Anton Van Leeuwenhoek was a Dutch tradesman and scientist. He looked at a pond with a microscope he made lenses for.
Discovery of plant cells
1838 - Present
Matthias Schlelden was a German botanist composed that all plant tissues are composed of cells
Discorvery of animal cells
1839 - Present
In 1838 Matthias Schleiden had stated that plant tissues were composed of cells. Schwann demonstrated the same fact for animal tissues, and in 1839 concluded that all tissues are made up of cells: this laid the foundations for the cell theory.
3rd part of the cell theory
1855 - Present
Virchow is credited with several very important discoveries. His most widely known scientific contribution is his cell theory, which built on the work of Theodor Schwann.